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Cascade Range Geology > Siskiyou Pass Volcaniclastic Deposits by ahochstaedter

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Taken by
ahochstaedter ahochstaedter
Explore score
1
Size
1.18 Gigapixels
Views
122
Date added
January 12, 2012
Date taken
July 31, 2011
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Description

Road cuts on Syskiyou Summit on Interstate 5 a few miles north of the California-Oregon border beautifully expose the volcaniclastic Colestin formation. The Colestin formation is early Oligocene (~34-28 Ma) in age and represents volcanic and depositional events closely following the initiation of Cascade volcanism. Close to the town of Colestin, road cuts in this area are considered the type area of the Colestin formation.

This road cut exposes a variety of volcanic and volcaniclastic units, including volcanic breccias, lava flows, dikes, and pyroclastic units. Channel scours are common and represent the ability of lahars or debris flows to erode into underlying material.

The information contained here is from Bestland (1987):
159.121.14.97/pubs/og/OGv49n07.pdf Will open in a new tab or window

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Stitcher Notes

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GigaPan Stitch version 1.0.0805 (Windows)
Panorama size: 1175 megapixels (63716 x 18444 pixels)
Input images: 216 (24 columns by 9 rows)
Field of view: 142.4 degrees wide by 41.2 degrees high (top=19.4, bottom=-21.8)
Settings:
All default settings
Original image properties:
Camera make: PENTAX
Camera model: PENTAX K-r
Image size: 4288x2848 (12.2 megapixels)
Capture time: 2011-07-31 10:06:59 - 2011-07-31 10:22:43
Aperture: f/8
Exposure time: 0.002
ISO: 200
Focal length (35mm equiv.): 225.0 mm
White balance: Fixed
Exposure mode: Manual
Horizontal overlap: 37.7 to 43.5 percent
Vertical overlap: 29.7 to 32.5 percent
Computer stats: 8098.69 MB RAM, 8 CPUs
Total time 16:51 (4.7 seconds per picture)
Alignment: 4:00, Projection: 2:54, Blending: 9:56
(Preview finished in 10:17)